<div class="dialog-top-bar" draggable mat-dialog-title>
    <td class="dialog-top-label"><h3>错误</h3></td>
  </div>
  <div mat-dialog-content [style.height]="contentHeight">
    <h2 class="error-message">{{message}}</h2>
  </div>
  <div mat-dialog-actions>
    <button mat-button (click)="dialogRef.close(null)">关闭</button>
  </div>
